Insert for concrete construction.



W. J. AHERN INSERT FOR CONCRETE CONSTRUCTION.

APPLICATION FILED APR.18,1911.

Patented Sent. 26. 1911.

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UNITED STATES PATENT OFFICE. I

WILLIAM J. AHERN, OF BOSTON, MASSACHUSETTS, ASSIGNOLR OF ONE-HALF TOALFRED M. PITTS, 0F BOSTON, MASSACHUSETTS.

INSERT FOR CONCRETE CONSTRUCTION.

Specification of Letters Patent.

Application filed April 18, 1911.

To all whom it may concern:

Be it known that I, IVILLIAM J. Annex, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented new and useful Improvements in Inserts for (ioncreteConstruction, of which the following is a specification. Myinvention'relates to inserts for use in Connection with concreteconstruction, and its objects are to provide a suitable support forfixtures capable of maintaining a con-- siderable weight, to utilize thereinforcing bar as a direct support for the attaching de vices, and tosimplify and render more effective the construction of the severalparts.

My invention primarily consists in forming an insert, the walls of whichare of thin metallic material, and through which extends a supportingmetallic bar whose ends are firmly embedded in the concrete surroundingthe insert; a hanger engaging with said bar, providing a means ofattachment for the parts which require to be supported.

' My invention further consists, in various improvements and novelarrangei'nents of parts more particularly hereinafter pointed out andclaimed.

Attention is hereby directed to the drawing in which similar numerals ofdesignation refer to similar parts throughout the several views.

Figure 1. is a plan view of my improved insert looking at the same frombelow. Fig. 2 is a vertical section of Fig. 1 on line 2-2. Fig. 3 is avertical section on line 3-3 of Fig. 1. Fig. 4 is a view of a section ofa concrete Wall, showing on a small scale the insert in position foruse.

Referring to the drawing: the insert i is here shown in the form of aninverted re ceptacle with thin walls. Preferably the said receptacle isin the form of an oval shaped box, as here shown, and is composed ofsheet iron, zinc or any other suitable material. In many cases materialother than metal may be used for the purpose, since no portion of thewall of said insert is relied upon for support, and even concrete couldbe used with good results. Through the wall of said insert near thedeeper portions thereof, extends the supporting rod 5, the ends of whichare long enough to insure being embedde. in the concrete to a sufficientPatented Sept. 26, 1911.

Serial No. 621,757.

extent to provide the required support, and to turn back and form theloops 6, 6. The said rod is composed of steel or iron or other suitablematerial, and is of sufficient thickness to sustain any strain to whichit may be subjected. Ill,tl1OSG cases where the object to be supportedis likely to be of: unusual weight, I insert through the loops 6, 6,reinforcing bars 757, which are of iron or steel or the like and whenembedded in the concrete distribute the weight over a wide area.

Upon the rod I), I loosely suspend the metallic supporting hanger 8, bymeans of the opening 9 extending through the upper part thereof. At thebase of said hanger is the threaded opening 10, for the purpose ofsecuring the same by means of bolts to braclc .ets, hangers, stringersor other parts which are to be removably and yet firmlyattached to thesurface of the ceiling or wall of the building. For the sake of economyof construction, I prefer to make the said hanger tapering at the topthereof as shown in the drawing. At the broad sides of my insert and atthe base thereof, I prefer to use the ears, ll, which are for thepurpose of providing a means of temporary attachment to the form usedfor molding the concrete structure or building where my invention is tobe put in use.

It has long been known that concrete of itself is not suil iciently hardor tough to firmly secure a nut or head of a bolt, and it is, moreover,difficult to determine the exactdesircd position of a bolt or of a setof bolts; hence it is desirable to provide an insert and means forsupporting and permitting lateral adjustment of saidholts. I am aware ofthe fact that it is old to provide an insert consisting of a reinforcedslot in which the heads of bolts may be inserted and secured, but insuch cases dependence is placed upon the wall of the insert itself asthe direct means of support and not upon reinforcing bars. I believethat I am the first to utilize the recess of the insert merely as ameans for introducing directly therein a portion of the reinforcing barand for securing thereto the bolt used as aforesaid for attachingfixtures.

In the prior devices used as inserts, it has been essentiak that thewalls of. the same be made of considerable thickness and rigidity inorder that they could not spread apart and permit the hhad of the boltor, nut to escape. For this purpose metal castings have been used, andgreat dependence has been placed upon reinforcing bars to sup port thesame, since without some means for securing the insert other than thesurrounding concrete there was grave danger that the insert would bepulled out when subjected to the weight of the fixtures secured thereto.

By the use of my invention, the builder is enabled to dispense with theheavy and expensive castings heretofore used for inserts, and to use alight structure of metal or other suitable material designed merely toprovide a recess within the ceiling or wall of the concrete v the strainof supporting the fixture being directed, Where it ought to be directed,solely to the reinforcing bar, which distributes the load over a largearea.

What I claim and desire to secure by Letters Patent is,

1. In an insert for concrete construction, an open box, a supporting barextending through said box and furnishing within said box a support forthe attachment of building fixtures.

2. In an insert for concrete construction, an open box, with asupporting bar extcnding through said box, and means for adjustablysecuring any part of the bar within said box to building fixtures.

3. In an insert for concrete construction, an elongated open box, asupporting bar extending lengthwise through said box, and means foradjustably securing any part of said bar within said box to buildingfixtures.

t. In an insert for concrete construction, an open box, a supporting barextending through said box, and means for detachably aflixing any partof said bar within said box to building fixtures.

5. In an insert for concrete construction, an open box, a supporting barextending through said box, combined with a device connected with saidbar and having detachable means for attachment to building fixtures.

6. In an insert for concrete construction, a box, a supporting barextending through said box, a hanger suspended from said bar within saidbox and moving freely on said bar and means for attaching said hanger tobuilding fixtures.

7. In an insert for concrete construction, a shallow box, a supportingbar extending through said box, and furnishing Within said box a supportfor building fixtures, the ends of said bar extending outside the boxand providing anchoring means.

8. In an insert for concrete construction, a shallow box, with thinresilient walls, a supporting bar extending through said box, the endsof said bar outside of said box be,- ing bent into loops and providinganchoring means, combined with a hanger suspended from said bar withinsaid box and moving freely upon said bar and means for securing saidhanger to building fixtures.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses, this 15th day of April, 1911.

WILLIAM J. AHERN. Witnesses:

T. HERBERT BILonEAU, HUBERT M. CHASE.

